Silkworms in spring will weave until they die, and candles will drain the wick every night. Silkworms in spring will weave until they die. Every night, candles will drain the wick of candles. The poem and famous saying "Spring Silkworm" praising teachers comes from untitled, which means that the silk of spring silkworms will spit out when cocooning, and wax oil will drip dry when candles burn to ashes, which shows the spirit of selfless dedication of teachers.